Multicolor, fluorescent self-healing gels were constructed through reacting carbon dots produced from different aldehyde precursors with branched polyethylenimine. The formed Schiff base reaction between the units displayed upon dots' surface and primary amine residues within polyethylenimine network, generating imine bonds. dynamic covalent bonds polymeric matrix endowed both excellent properties as well high mechanical strength. Moreover, viscoelastic of could be intimately modulated by...

Detection of reactive oxygen species (ROS) is important in varied biological processes, disease diagnostics, and chemotherapeutic drug screening. We constructed a ROS sensor comprising an ascorbic-acid-based hydrogel encapsulating luminescent amphiphilic carbon-dots (C-dots). The sensing mechanism based upon ROS-induced oxidation the ascorbic acid units within scaffold; as consequence, framework collapses resulting aggregation C-dots quenching their luminescence. C-dot–hydrogel platform...

Carbon dots (C-dots) prepared through heating of aminoguanidine and citric acid enable bimodal (colorimetric fluorescence) detection nitric oxide (NO) in aqueous solutions. The C-dots retained the functional units aminoguanidine, which upon reaction with NO produced surface residues responsible for color fluorescence transformations. Notably, aminoguanidine/citric were noncytotoxic, making possible real-time high sensitivity cellular environments. Using multiprong spectroscopic...

Pseudomonas aeruginosa is a highly virulent bacterium, particularly associated with the spread of multidrug resistance. Here we show that carbon dots (C-dots), synthesized from aminoguanidine and citric acid precursors, can selectively stain inhibit growth P. strains. The aminoguanidine-C-dots were shown both to target bacterial cells also biofilm formation by bacteria. Mechanistic analysis points interactions between residues on C-dots' surface lipopolysaccharide moieties as likely...

A hybrid carbon-dot (C-dot)–hydrogel matrix was constructed and employed for detection of bacteria.

The bis(μ-phenoxo) Fe(III)Ni(II) compound [Fe(III)(N3)2LNi(II)(H2O)(CH3CN)](ClO4) (1) and the bis(μ-phenoxo)-μ-acetate/bis(μ-phenoxo)-bis(μ-acetate) {[Fe(III)(OAc)LNi(II)(H2O)(μ-OAc)](0.6)·[Fe(III)LNi(II)(μ-OAc)2](0.4)}(ClO4)·1.1H2O (2) have been synthesized from Robson type tetraiminodiphenol macrocyclic ligand H2L, which is [2 + 2] condensation product of 4-methyl-2,6-diformylphenol 2,2'-dimethyl-1,3-diaminopropane. Single-crystal X-ray structures both compounds determined. cationic part...

Carbon dots (CDs) were synthesized hydrothermally by mixing citric acid (CA) and an antifolic agent, sulfanilamide (SNM), employed for pH sensing bacterial growth inactivation. Sulfanilamide is a prodrug; aromatic hetero cyclization of the amine moiety along with other chemical modifications produces active pharmacological compound (chloromycetin miconazole), mostly administered treatment various microbial infections. On hand, efficacy molecule as drug antimicrobial activity was very low. We...

The syntheses, characterization and crystal structures of four copper(II)/nickel(II)⋯uranyl(VI) self-assemblies composition [{NiIIL1}2·{(UVIO2)(NO3)2(H2O)2}] (1), [{CuIIL2}2·{(UVIO2)(NO3)2(H2O)2}]·0.68H2O (2), [{NiIIL2}2·{(UVIO2)(NO3)2(H2O)2}] (3) [{CuIIL3}·{(UVIO2)(NO3)2(H2O)2}]n (4) are described in this investigation (H2L1, H2L2 H2L3 the Schiff base ligands obtained on condensing 3-ethoxysalicylaldehyde with ethylenediamine, o-phenylenediamine trans-1,2-diaminocyclohexane, respectively)....

This paper presents the syntheses and crystal structures of four copper(II)–uranyl(VI) compounds [{CuIILOEt–en}2·{(UVIO2)(NO3)2(H2O)2}] (1), [CuII(MeCN)LOEt–pn(UVIO2)(NO3)2] (2), [(UVIO2)2(μ-H2O)2(NO3)4]∙4[CuIILOEt–py(H2O)]∙2MeCN (3) {[CuIILOMe–en(UVIO2)(NO3)]2[(UVIO2)2(μ-HO)2(NO3)4]}n (4), where H2LOEt–en, H2LOEt–pn, H2LOEt–py H2LOMe–en are 3-ethoxysalicylaldehyde-diamine (H2LOEt) or 3-methoxysalicylaldehyde-diamine (H2LOMe) ligands in which diamine functionality ethylenediamine,...

(1980). Application of linear response function theory in a coupled-cluster framework. Molecular Physics: Vol. 39, No. 2, pp. 519-524.

Abstract The work in this report presents syntheses, characterization, crystal structures and steady state time resolved photophysical properties of four compounds composition [Zn II 3 L 1 2 (N ) 4 ] ( ), [Cd n where HL are the Schiff base ligands, obtained on 1:1 condensation 3‐ethoxysalicylaldehyde (for )/3‐methoxysalicylaldehyde N,N ,2,2‐tetramethyl‐1,3‐propanediamine. Compound is a discrete trizinc(II) system, while other three one‐dimensional coordination polymers, building units are,...

Abstract Crystallization‐induced emission (CIE) has been reported for a handful of polyaromatic molecules, and this phenomenon generally ascribed to blocking nonradiative energy dissipation pathways through crystalline organizations. Herein, the first use single‐ring CIE‐based “invisible” ink is reported, which can be applied on varied surfaces. The comprises (3E)‐4‐[4‐(methylsulfanyl)phenyl]‐3‐buten‐2‐one (MSPB), exhibiting remarkable spontaneous water interface‐induced CIE. molecule,...

The work in this report describes the syntheses, characterization, crystal structures and magnetic properties of eight linear trinickel(ii) compounds composition [Ni(II)3(L(sal-pyr))2(propionate)4] (), [Ni(II)3(L(sal-pyr))2(benzoate)4]·CH3CN [Ni(II)3(L(sal-pip))2(acetate)4]·2CH3CN [Ni(II)3(L(sal-pip))2(propionate)4] [Ni(II)3(L(sal-pip))2(benzoate)4]·CH2Cl2 [Ni(II)3(L(sal-mor))2(propionate)4] [Ni(II)3(L(sal-mor))2(benzoate)4]·3CH2Cl2 () [Ni(II)3(L(sal-mor))2(o-Cl-benzoate)4]·2CH3CN·2H2O where...

Abstract In this paper, MC‐SCF and CI methods have been explored for the calculation of ground‐ excited‐state energies some aromatic heterocycles in PPP framework. A new algorithm solving orbital equations theory has suggested its performance compared with conventional gradient optimization technique. Energies first few transitions calculated rather extensive results.

Abstract A photoluminescent‐based “Turn On → Off On” technique was adopted for a toxic, heavy metal ion detection, that is, specifically chromium (VI) and pharmaceutically relevant ascorbic acid molecule. Metal‐free, environmentally benign, fluorescent carbon dots, potential vehicle spectrofluorometric were successfully deployed as sensors. Carbon dots synthesized from citric sulfanilamide conserve the fragments of precursor molecule on surface. Zeta measurement evidenced positively charged...

Abstract Multicolor emissive Schiff base lanthanide Poly(methyl methylacrylate) [PMMA] composite films are fabricated for white light generation. Three isostructural lanthanides (III) complexes [Eu III 2 (L) (NO 3 ) ( dmf 1 ), Tb and Gd )] synthesized, characterized from the ligand obtained by 1:1 condensation of salicylaldehyde 2‐(2‐Aminoethoxy)ethanol, H L. The photoluminescent studies revealed pure blue, green, red color emissions L, Eu L complexes, although central metal centers have...